Electric warp stop-motion for looms.



No 669,620. Patented Mar. l2, l90l; J. A. JJLARK; ELECTRIC WARP STOPMOTION FOR LOUMS.

(Application filed Dec. 20, 1900.)

(No lodal.)

2 Sheets-Sheet l l l l'l l -No. 669,620. Patented Mar. l2, I90l. J. A.CLARK.

ELECTRIC WARP STOP MOTION FOR LOOMS.

(Appliz-ation filed. Dec. 20, 1900.:

2 Sheets8hoat 2.

No Ilodal.)

' NITED rates ArnNr rrrcn.

JOHN A. CLARK, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON dc.KNOWLES LOOM WORKS, OF SAME PLACE.

ELECTRIC WARP STOPMOT|ON FOR LOOMS.

SPECIFICATION formingpart of Letters Patent N 0. 669,620, dated March12, 1901.

Application filed December 20, 1900. Serial No. 40,478. (No model.)

To all whom it may concern: end view of a portion of a loom, showingparts Be it known that I, JOHN A. CLARK, a cit-iof the patented electricwarp stop motion zen of the United States, residing at WVorces' abovereferred to sufficient to illustrate the ter, in the county of Worcesterand State of construction thereof and my supplemental Massachusetts,have invented certain new attachment combined therewith. Fig. 2 cor- 55and useful Improvements in Electric Warp responds with the parts shownat the left in Stop-Motions for Looms, of which the follow- Fig. 1,except that my supplemental attaching is a specification. ment is shownin its opposite position when My invention relates to electric warpstopthe electric current is broken. Fig. 3 is an IO motions for looms,and more particularly to edge view of the parts shown in Fig. 2 look- 60a supplemental attachment or mechanism to ing in the direction of arrowat, same figure. be combined with or applied to any well- Fig. eshows afront view of my supplemental known style of electric warp stop-motionfor attachment looking in the direction of arrow looms. b, Fig. 5. Fig.5 is an edge view looking in The object of my invention is to provideathe direction of arrow 0, Fig. 4; and Fig. 6 65 supplemental attachmentor mechanism of corresponds to Fig. 5, but shows the attachvery simpleconstruction and operation adaptment in its outer position when theelectric ed to be combined with any ordinary style of current is broken.Figs. 4, 5, and 6 are shown electric warp stop-motion for looms by meanson an enlarged scale.

of which the electric current can be tempora- In the drawings, Fig. 1corresponds with 70 rily broken, if desired, by the operator at any Fig.1 of the Patent No. 637,234, above retime during the operation ofweaving, but ferred to, and the construction and operation especiallyafter one or more threads have of the electric warp stop-motion showncorbeen tied up, making a slack in said threads, respond with theconstruction and operation this slack heretofore causing the loom tostop of the electric warp stop-motion shown and 75 again through theoperation of the electric described in said patent, except that mysupwarp stopmotion, the same as if a warpplementalattachment is combinedtherewith, thread was broken. as will be hereinafter described, to breakthe By means of my supplemental attachment electric current whendesired, and therefore or mechanism, consisting, broadly, of a it willonly be necessary to briefly describe 8o spring-actuated latch or levercombined with the electric warp stop-motion shown in the an electricwarp-stop-motion mechanism, I drawings.

am enabled to prevent the automatic opera- In the accompanying drawingsthe same tion of the warp-stopping mechanism until reference-figures areused as in the drawings the slack in the loose threads, above referredof said patent. 85

to, has been taken up in the ordinary process 1 is the 100m side orframe. of weaving, as will be hereinafter fully de- 2is an angularbracketsecured to the frame. scribed. A corresponding bracket is securedto the I have shown in the drawings my suppleopposite side of the loom.(Notshown.) To mental attachment or mechanism for breakthe upper end ofthe bracket 2 is adjustably 9o ing the electric current combined with awellsecured by a bolt 21 a bracket 22, and to the known style ofelectric warp stop-motion for upper end of said bracket 22 are securedthe looms which is shown and described in United ends of a pair oflease-rods 24. The usual States Patent No. 637,234, of November 21,shipper 28 is formed of spring metal, as is 4.5 1899; butitwill beunderstood that my supplecustomary, and is secured at its lower end to 5mental attachment or mechanism for breakthe front of the frame 1, asshown in Fig. 3. ing the electric current may be combined with 29 is theusual notched plate, by means of or applied to any other style ofelectric warp which the shipper28 is guided and also looked stop-motionfor looms. in position in the notch to set the loom in Referring to thedrawings, Figure 1 is an motion in the usual way through the beltshipper30 and its operating-lever 31, the latter being forked at its outer endto loosely engage the shipper 28, as shown in Fig. 3.

The bracket 32 is bolted to the loom side 1 at the inner side of theshipper, and said bracket supports the magnet box or case 33, in whichis located an electromagnet 34. At the upper front corner of the box orcase 33, in suitable bearings 35, is pivoted an armature-lever 36, theinner end of which supports an armature 37 and the outer end of whichmay have a series of small holes 38 therein.

Loosely hung and adapted to swing on a stud 43, that projectshorizontally from the side of the frame 1 below the guide-plate 29, isan L-shaped knock-0E lever 44, the lower horizontal end 44 of whichprojects laterally behind the shipper 28 when the shipper is inengagement with the notch in the guide-plate 29. In the lower part ofthe knock-off lever 44 is pivoted a gravity-latch 46, the free end ofwhich extends inwardly and is provided with a notch or shoulder 47. Awire connector or link 49 connects the latch 46 with the armature-lever36, so that there will be a unity of mot-ion between the latch 46 andthe armature-lever 36.

It will be obvious that if the magnet attracts the armature 37, as whenthe circuit is completed, the armature-lever 36 will rise at its outerend and cause a similar movement of the latch 46, which being moved intothe path of the lay (not shown) is struck thereby on its forwardmovement and, together with the knock-0K lever 44, is forced forward ortoward the front of the loom, so that said knock-off lever 44, strikingthe shipper 28,

will disengage it from the notch in the guideplate 29 and permit it toimmediately swing forward and operate the belt-shipper 30 to stop theloom in the well-known way.

The battery 50 is located in a convenient place, and from one of thepoles may lead the insulated circuit-wire 51 and from the other theinsulated circuit-wire 52, which lies between the flanges of the frame 1and is supported where necessary by suitable eyes 53. The wire 51 passesto the magnet 34 and the wire 52 passes through a tubular bolt 5 and issecured to a binding-post (not shown) back of the bracket 2, which postis connected with the metallic contact-roll. (Not shown.)

All of the above-described parts correspond to similar parts shown anddescribed in said Patent No. 637 ,234, to which reference is here madefor a more detail description of the same, if desired.

1 will now describe my improvements, consisting of a supplementalattachment or mechanism, combined with the parts above described, tobreak the electric current when desired and prevent the operation of theelectric warp-stop mechanism.

In the patent above referred to,No. 637,234, there is a stud 39 in frontof the magnet box or case, which has a stationary contact-spring 40thereon'and extending laterally therefrom in such a position withrelation to the shipper 28 as to have an electric contact therewith whensaid shipper is thrown outward from and held in the locking-notch of theguideplate 29 and the loom setin operation. 'When the shipper is in itsoutward position, as above described, and in engagement with thecontact-spring 40 of said patent, the electric current, which passesthrough the shipper 28, the loom-side 1, bracket 2, and circuitrods (notshown) which guide the drop-bars, is completed by a drop-bar on one ofthe warp-threads dropping into contact with the metallic roll '10,(shown in said patent,) and there is nothing to prevent the completingof the circuit, and consequently the stopping of the loom when thishappens. To prevent the completing of the circuit and the stopping ofthe loom, as above described, if desired, in.

case of slack in any of the tied-up warpthreads or for any other cause,I provide a spring-actuated latch or lever 76, of metal or someconducting material, which is pivoted on a stud 75, fast in a stand 32"on an extension 32' ofthe bracket 32. The latch 76 has at its upper enda screw-eye 77, to which is attached one end of a spiral spring 78. Theother end of said spring is attached to a screweye 79 on the extension32' of the bracket 32. The screw-eye 79 is in such a position relativeto the axis of the latch 76 that the spring 78 will act-to hold thelatch in its forward position in contact with the shipper 28, as shownin Fig. 5, 01' in its opposite position out of contact with the shipper28, as shown in Fig. 6. The pivotal motion of the latch 76 is limited bytwo pins 80tand 80', extending out from the hub 76 of the latch 76 onopposite sides of the pin 81, fast in the stand 32,.said pins 80 and 80coming in contact with the pin 81. An insulated circuit-wire 42 leadsfrom a pole in the magnet 34 to a bindingpost 82 on the hub 76 of thelatch 76. The latch 76 or the bracket 32, on which it is supported, isinsulated from the loom-frame 1, so that the current cannotbe carriedthrough said frame.

It will be seen that the latch 76 takes the place of the contact-spring.40 referred to above and shown and described in said Patent No.637,234, and that when said latch 76 is in its forward position, incontact with the shipper 28, and a drop-bar on one of the warpthreadsdrops into contact with the metallic roll of said patent the circuitwill be completed and the loom stopped, the same as in said patent-thatis, the latch 76 forms a part of the electric circuit.

When the latch 76 is moved out of contact with the shipper 28, as shownin Figs. 2 and 6, by the operator, then the electric current is broken,and the shipper 28 will not be operated to stop the loom until saidlatch 76 is moved into contact therewith, as shown in Figs. 1 and 5.

The advantages of my improvements will be readily appreciated by thoseskilled in the art.

My supplemental attachment or mechanisrn'for breaking the electriccurrent is of very simple construction and operation and easily combinedwith the patented electric warp stop-motion above referred to or withother styles of electric warp stop-motions, and the operator by simplymoving the latch 76 outwardly or out of position to be engaged by theshipper 28 when the shipper is moved into position to start the loom canbreak the electric current and prevent the stopping of the loom by theelectric warp stop-motion. When the loom has been run a sufficientlength oftime to take up the slack warpthreads or for other causes, theoperator can then move the latch '76 into engagement with the shipper 28to render the electric warp stop-motion effective to stop the loom incase of the breaking of a warp-thread.

It will be understood that the details of construction of mysupplemental attachment or mechanism and the particular manner ofcombining the same with the electric warp stop-motion shown in thedrawings and above described may be varied, if desired.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination with an electric warp stop-motion for looms, and theshipper-lever to stop andstart the loom, of a spring-actuated latch orlever, adapted to be moved out of engagement with the shipper-lever, andmeans to hold the latch out of engagement therewith, to break theelectric circuit, and prevent the operation of the electric warpstopanotion to stop the loom, after the shipper-lever is moved to startthe loom, substantially as shown and described.

2. The combination with an electric warpstop-motion mechanism, in whichthe movement of the shipper-lever to start the loom renders effectivethe electric warp stop-motion to stop the loom, of the shipper-lever,and a device adapted to be moved out of engagement with theshipper-lever, to prevent the operation of the electric warp stop-motionto stop the loom, and into engagement with the shipper-lever to permitof the operation of the electric warp stop-motion to stop the loom,substantially as shown and described.

3. The combination with an electric Warpstop-motion mechanism, in whichthe movement of the shipper-lever to start the loom renders effectivethe electric warp stop-motion to stop the loom, of the shipper-lever,and a spring-actuated latch or lever, adapted to be moved out ofengagement with the shipper-lever, to prevent the operation of theelectric warp stop-motion, to stop the loom, and into engagement withthe shipper-lever to permit of the operation of the electric warpstop-motion, to stop the loom, substantially as shown and described.

JOHN A. CLARK.

Witnesses:

JOHN B. SYME, R. O. DOUGLAS.

